Two-color attachment for printing presses



June 1936- J. B. STREET ET AL 2, 6,

TWO-COLOR ATTACHMENT FOR PRINTING PRESSES Filed Sept. 50; 1935 2 Sfieets-Sheet 1 ATTORNEY I June 30, 1936. J B" STREET ET AL 2,046,218

TWO-COLOR ATTACHMENT FOR PRINTING PRESSES Filed Sept. 30, 1935 2 Sheets-Sheet 2 A J J F" IT 7 a 352 26 (fa/227.5. Szmeffl/Zd 551772072 INVENTORS ATTORNEY aaw Patented June 30, 1936 UNITED STATES TWO-COLOR ATTACHMENT FOR PRINTING ,PRESSES John B. Street and Otto E. Simon, Jackson, Miss.

Application September so, 1935, Serial No. 42,922

2 Claims.

This invention relates to two color attachments for printing presses. Hitherto multi-colo-rjob printing presses have been complex expensive structures for the most part and where attempts have been made to provide color appliances or attachments to job printing presses, alterations to the presses have been necessary.

The present invention provides a simple multi-cclor inking device including two independent inking discs carriedby a base plate which may be secured to the frame of the press or the tracks on which the inking rolls run, by two set screws, the base plate being supported upon the rotary ink platen or plate of the job press by these set screws and by a pair of rollers, the

pair of discs being adapted to apply two differ ent colors of ink to the inking roll of the press, and .being rotated by friction wheels bearing on the surface of the ink platen or plate of the press.

The present invention because of its simplicity of construction and eificiency in operation, and because of its ease of attachment to ordinary job printing presses, renders it of special commercial value in its intended field of use.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings forming part of this specification,

Figure 1 is a top plan view of the color inking attachment embodying the invention applied to the tracks and to the rotary ink platen or ink plate of a conventional job printing press, the tracks and ink plate being shown in dotted lines.

Figure 2 is a front elevation of the parts shown in Figure 1. v

Figure 3 is a side elevation of the parts shown in Figure 1 looking toward the right side of Figure 1.

Figure 4 is a detail cross sectional view taken on the line 4-4 of Figure 1.

Figure 5 is a detail cross sectional view taken on the line 55 of Figure 1.

Figure 6 is a detail cross sectional view taken on the line 6-6 of Figure 1.

Figure '7 is a fragmentary bottom plan view of the parts shown in Figure 4.

Referring now to the drawings in which like characters of reference designate similar parts in the various views, I0 designates the track which guides the ink rollers of an ordinary job printing press and II designates the rotary ink platen or ink plate of the press, these parts being of conventional design. a

In carrying out the invention a substantially square base plate I2 is cut away at two of the corners, as shown at IS. A pair of bars Hi are secured to the side edges of the plate by screws l5 and each bar is provided with a thickened arcuate finger I 6, best shown in Figures 3 and 4, which is adapted to be secured to the track it] by means of screws H. The thickened finger is provided with an offset lug l8 which is secured to the front edge of the base plate by means of a screw l9.

The base plate I2 is provided on the bottom face near the cut away rear edges l3 with depending bearing lugs 2|], best shown in Figure;

6, and in each lug there is journaled the shaft 2| of a roller 22. The rollers 22 bear upon the top surface of the ink plate II and coact with the set screws I! in supporting the base plate of each disc is provided with a groove 25 and.

the edge of the corresponding opening 24 in the base plate is provided with a groove 26. These grooves coact in forming a ball race to receive bearing balls 21 so that the disc may rotate upon its axis with minimum friction. The bearing balls also hold each disc assembled with the base plate.

To apply the bearing balls to the ball race it will be seen by referring to Figure 5 that an opening 28 is formed in the bottom face of each disc to communicate with the ball race, the bottom face of the disc being provided with a threaded boss 29 around the opening to receive a screw pin 30. When the pin is removed the balls may be fed into the ball race until the race is full and then the pin may be screwed into the boss to project into the opening 28 and preventescape of the balls.

As best shown in Figure 4, each disc is rotated axially by means of a friction wheel 3| which bears upon the top face of the rotary ink plate I l 32 which projects from the end of a plate 33' 'median line of the base plate between both discs 23. The purpose of the groove is to separate the" different colored inks so that they will not intermix on the base plate,

The ends 31 of the side bars I! project over the cut away rear corners I3 of theb'aseplaite alnd provide grips by means of which the assembled baseplate and discs may be transported o'r otherwise manipulated when desired.

To apply the device to a conventional printi'ri I press it is merely necessary to passftlie'setiscrew- I1 through'the'curved'fingers l6 and against the track or into 'a convenient threaded opening in the track or other convenientpart of the frame of the press. Thus no alterations are necessary. The curved fingers on the side bars of the base plate elevate the secured end of the 'base plate 'sothat the fingers will cooperate'with the rollers' 22 in-supporting the base plate and discs paral- "lel with the ink plate of the press.

From the above description 'itis thought that the construction and operation of the invention will be fully understood without further explanation.

,What'is claimed is:

1. A multi-color inking attachment for printing presses having a rotary ink plate, comprising a base plate, means for securing 'thebase plate at one end to the printing press, a pair of rollers disposed on the bottom face of the base plate and adapted to coact with said means in supporting the base plate upon and parallelwith the ink plate of the printing press, a pair of discs for supplying respectively different colors of ink to the ink rollers of the press, said discs being rotatable on their axes in spaced openings formed in the base plate, ball bearings supporting the discs 7 'at'their peripheries in said-openings, and friction wheels supported by the'base plate and bearing against the underneath surfaces of the discs,

said friction wheels being adapted to engage the rotary ink plate of'the press and rotate the discs, 2. A multi-color inking attachment for printing presses, comprising a base plate, downwardly curyed fingers secured to the base plate, set .7 screws carried by the fingers, said fingers and st *screws forming means for removable securing the base plate to a stationary portion of the printing press, a, pair of rollers disposed on .the bottom fa'ce of the base plate remote froin the fingers and adapted to engage the-ink 'pla'te'of the press and coact with 'th'e fingers in supporting the base plate uponthe ink plate and parallel with theinkpl'at'e, a-plurality of'discsadapted to supply respectively different colored inks to the inking run of 'the printing press, there being openings in the-base plate receiving the discs, grooves in the peripheries of the discs and in the openings forming ballracesyballs in said ball races permitting the discs to rotate axially' on their axes with minimum friction, and friction Wheels mounted on the base plate and engaging associated "discs, said wheels being adapted to age the rotary ink :plate ofjthejpre c tatethediscs. l V V I JOHN B. STREET.

OTTO E.- SIMON. 

